Ma Chao led his troops to attack Cao Ying, and Chu Xu rushed out to meet Ma Chao. Chu Xu was injured, Cao Jun retreated to the camp, and then used a trick to make Ma Chaojun retreat. Han Sui made peace, but Cao Cao pretended to answer. Ma Chao was afraid that Cao Cao would pretend to make peace, so he asked Han Sui to attack Cao Cao the next day and attack Huang Xu himself. The next day, Cao Cao took Han Sui to catch up and made Ma Chao doubt Han Sui. Then write to Han Sui, erase the key points, and let Ma Chao deepen his misunderstanding of Han Sui. Han Sui saw that Ma Chao didn't believe in himself and was ready to take refuge in Cao Cao. Han Sui wanted to set a trap against Ma Chao. When Ma Chao saw through and tried to kill Han Sui, Cao Cao Jun arrived and Ma Chao retreated.

Simply put, it is:

Ma Chao and Chu Xu had a big fight, and Chu Xu was injured. Cao Cao used double agents to bring Han Sui and Ma Chao out of harmony. Han Sui and Ma Chao had civil strife, Cao Jun was killed and Ma Chaojun was defeated.